Engine or check point support are worn-out or weakened their fastening. These blocks can move slightly at coupling switching off. Check a condition of support and bolts of their fastening (Head Ryadny the six-cylinder engine).

The disk/basket of coupling or flywheel will bend press. Remove coupling (Head Coupling and the transmission line) and check a condition of its components and a flywheel.

Squeal or roar arise at complete inclusion of coupling (the pedal is released)

The coupling bearing in the holder of the bearing on a check point is jammed vyzhimny. Remove coupling (Head Coupling and the transmission line) and check a bearing condition. Remove all agnails and teases, and grease the bearing before installation into place.

Squeal or roar arise at complete switching off of coupling (the pedal is squeezed out)